分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Gymnotiformes (Knifefishes)
電鰻目 (Knifefishes) >
Gymnotidae (Naked-back knifefishes)
裸背電鰻科 (Naked-back knifefishes) > Gymnotinae
Etymology: Gymnotus: Greek, gymnos = naked (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 底中水層性. 熱帶
South America: Amazon-Orinoco basins and the Guyana Shield.
南美洲: 亞馬遜河-奧里諾科河的流域與蓋亞那盾甲。
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 34.5 cm SL 雄魚/尚未辨別雌雄; (Ref. 101566); 最大體重: 83.50 g (Ref. 101566)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
Differs from all congeners by having a dark brown background color marked by 8-18 white or pale yellowish bands (or 4-22 dark inter-bands) which in the anterior 1/3 to 2/3 of body are absent or largely restricted to the ventral part of the lateral surface. Further distinguishable from G. anguillaris and other congeners on the basis of several meristic and morphometric characters: absence of a clear or pale patch near the caudal end of the anal fin and presence of one laterosensory canal pores in the preopercular-mandibular series at the dorsoposterior portion of the preopercle; maximum size 16.2 cm TL; precaudal vertebrae 39-43 (mode 41); pectoral-fin rays 12-14; scales above lateral line 6-8 (mode 7); pored lateral-line scales to first ramus 44-61 (median 52); total number of pored lateral-line scales 72-102 (median 86); anal-fin pterygiophore scales 5-7; adult preorbital length 29.3-38.2% HL; adult mouth width 35.2-46.6% HL; adult body width 3.5-5.4 (mean 4.8) % TL (Ref. 52004).
藉由有一個有別於所有同類有顯著的在前 1/3 中對身體中的 2/3 缺席的 8-18條白色或者灰白的淡黃色的條紋 (或者 4-22個深色的之中-條紋) 的深褐色的背景顏色或主要地侷限於側面表面的腹部份。 進一步根據一些體節形質特徵與型態特徵的特徵可與 G. anguillaris 與其他的同類區別: 臀鰭在尾鰭末端的附近缺乏一個清澈或者灰白的小區塊而且在前鰓蓋骨的後背部分的前鰓蓋骨-顎骨的系列中有一個側線管孔; 最大體長 16.2 公分TL; 尾前椎 39-43(模態 41); 胸鰭鰭條 12-14; 鱗片在側線上面 6-8(模態 7); 對第一個分支 44-61 的有細孔的側線鱗片;(中動脈 52) 有細孔側線鱗片 72-102 的總數;(中動脈 86) 臀鰭支鰭骨鱗片 5-7; 成魚眶前骨長度 29.3-38.2% HL; 成魚嘴寬度 35.2-46.6% HL; 成魚身體寬度 3.5-5.4(意謂 4.8)% TL.(參考文獻 52004)
Facultative air-breathing in the genus (Ref. 126274)
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔魚
南美洲: 亞馬遜河-奧里諾科河的流域與蓋亞那盾甲。
Crampton, W.G.R. and J.S. Albert, 2003. Redescription of Gymnotus coropinae (Gymnotiformes, Gymnotidae), an often misidentified species of Neotropical electric fish, with notes on natural history and electric signals. Zootaxa 348:1-20. (Ref. 52004)
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00263 (0.00147 - 0.00471), b=2.88 (2.71 - 3.05), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
營養階層 (Ref.
69278): 3.4 ±0.4 se; based on size and trophs of closest relatives
回復力 (Ref.
120179): 中等的, 族群倍增時間最少 1.4 - 4.4年 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low to moderate vulnerability (32 of 100).
